Hundreds evacuated in airport false alarms

Five-hundred passengers at Hobart Airport had to be evacuated and re-screened through security because of two false fire alarms.

The first was triggered about 1.40pm on Friday, leading to the evacuation of the departures hall.

It was deemed to be a false alarm but a second one was triggered straight after.

Passengers had to be re-screened through security before they could return to the departures hall and board their plane.

The airport's chief operating officer said there will be an investigation into the incident.

"We are sorry for any inconvenience caused this afternoon," Matt Cocker said in a statement on Friday.

"The safety of the travelling public is our number one priority and as such, we needed to take these matters seriously and work through the required protocols."